JP2008143233A - Vehicle front body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle front body structure capable of preventing ingress of a structure of a counter vehicle or the like into a cabin side by correctly ensuring the area for the input from a front side by a collision or the like without increasing the size of a bumper reinforcement, and enhancing the safety of an occupant by efficiently absorbing the collision load. <P>SOLUTION: A connection brace 7 extending so as to be located upwardly toward an outer side in the vehicle width direction with one end thereof being joined with a front end of a side member 1, and the other end thereof being joined with a front end of an upper frame 6 is installed on the outer side in the vehicle width direction from the side member 1 at the front end of a vehicle. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle body structure of a vehicle front portion for reducing a collision load from the vehicle front portion.

  2. Description of the Related Art A vehicle structure for protecting a passenger or a pedestrian by reducing a shock at the time of a collision is known. The structure of the front part of the vehicle employs a structure that alleviates an impact when it collides with another vehicle or the like. For example, the side member is configured to be crushed backward sequentially from the front end side. Moreover, in order to reduce the damage property at the time of a collision, the structure which ensures the area which receives the input from a front in the vehicle front surface is taken (for example, refer patent document 1).

  That is, a structure is adopted in which the front ends of the side frames are connected to each other by a bumper reinforcement (front end cross member) and the end of the bumper reinforcement is extended to the outside of the side frame. The bumper reinforcement of the part extended outside the side frame functions as an area member that receives input from the front, and inputs from the structural member of the oncoming vehicle even at the position of the outer part of the vehicle where there is no structure such as the engine It is possible to prevent the structural member of the oncoming vehicle from entering the passenger compartment.

JP 2005-231436 A

  However, in the conventional vehicle body structure of the front part of the vehicle, the outer part of the bumper reinforcement functions as an area member that receives the structural member of the oncoming vehicle, but the type of the opponent vehicle at the time of the collision is RV, SUV, sedan, For example, the position in the width direction and the height position of the side member of the opponent vehicle are various. For this reason, in order for the bumper reinforcement to function as an area member that receives the structural member of the oncoming vehicle regardless of the vehicle type of the opponent vehicle, the bumper ring in which the width of both ends where no structure such as an engine exists is widened in the vertical direction It is necessary to have a force. Alternatively, it is necessary to provide a bumper reinforcement having a wide vertical width over the entire length of the vehicle width. In particular, since there is no structure in the portion between the side frame and the wheel, there is a high need to secure an area member that receives input from the front.

  However, when a bumper reinforcement in which the widths at both ends are widened in the vertical direction is used, the shape becomes complicated, resulting in poor material yield and high cost. In addition, when a bumper reinforcement having a wide vertical width is provided over the entire length of the vehicle width, the width of a portion where a structure such as an engine is present becomes wide and the weight increases.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a vehicle body structure of a vehicle front portion that can ensure an area for input from the front without increasing the size of the bumper reinforcement. .

  In order to achieve the above object, the vehicle body structure of the vehicle front portion of the present invention according to claim 1 has a base end on a pair of front pillars that are positioned on the left and right of the vehicle front portion of the vehicle and extend vertically. A pair of left and right upper frames that are joined and extend forward of the vehicle, and a pair of side members that are disposed below the upper frame and on the inner side in the vehicle width direction of the front pillar and extend forward of the vehicle compartment And a front end cross member for connecting the front end portions of the pair of side members to each other, the vehicle body structure of the front portion of the vehicle is disposed on the outer side in the vehicle width direction with respect to the side members, and one end thereof is the front end of the side member. A connecting brace that is joined and has the other end joined to the front end of the upper frame and extended upwardly toward the outside in the vehicle width direction is provided at the front of the vehicle. The features.

  In the first aspect of the present invention, a connecting brace having one end joined to the front end of the side member and the other end joined to the front end of the upper frame is provided on the outer side in the vehicle width direction. Without changing the shape, the connecting brace can ensure an area for the input from the front. In addition, since the connecting brace is extended so as to be located upward as it goes to the vehicle outer side, it can receive a wide range of inputs from the structural members of the oncoming vehicle during a vehicle collision, and has a simple structure. Thus, the intrusion of the structural member of the oncoming vehicle into the passenger compartment can be efficiently suppressed. Further, the input from the front received by the connecting brace can be continuously distributed by the side member and the upper frame.

  According to a second aspect of the present invention, there is provided a vehicle body structure of a vehicle front portion according to the present invention, wherein the vehicle body structure of the vehicle front portion according to the first aspect extends forward from a strut house that supports a suspension member, A plate-like fender shield that is joined to the upper frame and closes between the side member and the upper frame is provided, and a front portion of the fender shield is joined to the connecting brace so that the side member and the upper frame are joined. And the connecting brace and the strut house so as to surround the fender shield.

  In the present invention according to claim 2, since the fender shield is provided in the part surrounded by the side member, the upper frame, the connecting brace and the strut house, and the fender shield is joined to the surrounding member, the deformation in the part is performed. The load at the time of collision can be absorbed efficiently, for example, the upper frame can be prevented from being bent in the middle.

  According to a third aspect of the present invention, there is provided a vehicle body structure for a vehicle front portion according to the present invention, wherein the connecting brace is located on the front end of the upper frame relative to the front end side of the side member. It is characterized in that it is formed so that the width on the side becomes narrow.

  In the present invention according to claim 3, since the width of the upper side of the connecting brace is narrowed, it is possible to avoid the interference with the tire arranged on the outer side in the vehicle width direction, and the area for the input from the front can be accurately determined. Can be set.

  According to a fourth aspect of the present invention, there is provided a vehicle body structure for a vehicle front portion according to the present invention. The vehicle body structure for a vehicle front portion according to any one of the first to third aspects, wherein a radiator support is connected to the connecting brace. It is characterized by.

  In this invention which concerns on Claim 4, a connecting brace can be firmly supported by connecting a radiator support to a connecting brace.

  The vehicle body structure of the front part of the vehicle according to the present invention can improve the collision safety of the vehicle by accurately securing an area for the input from the front with a simple structure without increasing the bumper reinforcement.

  FIG. 1 is a perspective view showing a vehicle body structure of a vehicle front portion according to an embodiment of the present invention, FIG. 2 is a disassembled state of FIG. 1, FIG. 3 is a side view of the vehicle front portion, and FIG. FIG. 5 is a plan view of the main part of the front of the vehicle, FIG. 6 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 7 is a cross-sectional view taken along the line BB in FIG. FIG. 8 shows a cross-sectional view taken along line CC in FIG.

  As shown in FIGS. 1 and 2, a pair of front pillars 3 extending in the vertical direction of the vehicle are provided on the left and right sides of the front portion of the vehicle compartment S of the vehicle. The base ends of a pair of left and right upper frames 6 extending forward are joined. The left and right front pillars 3 are connected to each other by a cowl top panel 9 extending in the vehicle width direction, and below the cowl top panel 9 is a dash panel that partitions the vehicle compartment S and a region in front of the vehicle compartment (food room). 10 is arranged. Cylindrical strut houses 16 that support the suspension device are provided on the left and right front sides of the dash panel 10 and are joined to the upper frame 6.

  In addition, a pair of left and right front floor side members (side members) 1 extending in the vehicle front-rear direction are disposed at positions on the inner side in the vehicle width direction from the front pillar 3 and below the upper frame 6, and the side members 1 extends from the lower side of the passenger compartment S along the dash panel 10 to the front of the vehicle. A front end portion of the upper frame 6 is connected to a front end portion of the side member 1 via a connection brace 7, and the front end portions of the side members 1 are connected to each other by a front end cross member 2.

  The area in front of the vehicle compartment (hood room) referred to here is an area of the front part of the vehicle covered with the hood, and in the case of a vehicle in which the engine is placed in the front part, it is generally called an engine room. Refers to the part.

  As shown in FIGS. 1 and 2, the front pillar 3 is inclined upward and rearward on the upper side of the vehicle and connected to a roof pillar (not shown), and the lower side is arranged in parallel with the side member 1 at the lower end and is located behind the vehicle. It is connected to the extending side sill 4. A reinforcing brace 8 (see FIG. 2) as a reinforcing member is provided between the side sill 4 (the lower end portion of the front pillar 3) and the side member 1, and connects the side sill 4 and the side member 1. ing.

  As shown in FIG. 3, a joint projecting portion 5 projecting toward the vehicle front side is integrally provided at a substantially central portion of the front pillar 3, and a base end of the upper frame 6 is overlapped with the joint projecting portion 5. Being joined.

  The upper frame 6 is configured such that the lower edge portion is formed in a curved shape and the lower edge portion of the upper frame 6 and the front edge portion of the front pillar 3 are continuous.

  On the other hand, a connecting brace 7 joined to the front end surface of the side member 1 is joined to the front end surface of the upper frame 6 to connect the upper frame 6 and the side member 1. The lower edge of the connecting brace 7, the lower edge of the upper frame 6, and the front edge of the front pillar 3 are configured to have a continuous arch shape when viewed from the vehicle lateral direction. That is, an impact load input to the front portion of the vehicle in a collision or the like is transmitted to the upper frame 6 via the connection brace 7 and further transmitted to the front pillar 3.

  As shown in FIGS. 4 and 5, the connecting brace 7 continuously extends obliquely inward in the vehicle width direction from the front end portion of the upper frame 6 and is in front of the vehicle from the front end surface of the upper frame 6 and in the vehicle width direction. The connecting brace 7 is joined to the front end face of the side member 1 located on the inner side, and is positioned upward as it goes outward in the vehicle width direction when viewed from the front of the vehicle. That is, the connecting brace 7 is inclined upward in the vehicle width direction outside at the position outside the side member 1 in the vehicle width direction, and the front surface of the front end portion of the side member 1 and the front surface of the front end portion of the upper frame 6 are It extends over.

  Further, the connecting brace 7 is formed so that the width of the front end side (outward in the vehicle width direction) of the upper frame 6 is narrower than the front end side of the side member 1, and the interference with the tire disposed outside the vehicle is prevented. The structure has been avoided.

  As shown in FIG. 7, the connecting brace 7 has a closed cross section composed of an outer panel 7 a and an inner panel 7 b, and is joined by welding so that the inner panel 7 b of the connecting brace 7 closes the front surface of the front end portion of the side member 1. Has been. The front end cross member 2 is coupled to the front surface of the outer panel 7 a of the connecting brace 7.

  The front end cross member 2 is connected to a connecting brace 7 joined to the front end surface of the side member 1 by bolts 15 (see FIG. 4), connects the connecting braces 7 arranged on the left and right sides, and a pair of left and right sides. The front end portions of the member 1 are connected to each other. The front end cross member 2 is also used as a bumper reinforcement / attachment.

  As shown in FIGS. 1, 2, 3, and 6, the upper frame 6 is formed with an extending portion 11 that extends above the vehicle. An end of an upper bar 12 that supports the front edge of the hood is joined to the extended portion 11, and the upper bar 12 is supported by the extended portion 11. When the upper bar 12 has an excessive input from above the hood (for example, an excessive input from the hood due to a pedestrian collision or the like), the extending portion 11 is deformed to make the excessive input effective. It is configured to absorb. The upper bar 12 is a structural member arranged in the vehicle width direction at the front portion of the hood room (a region in front of the vehicle compartment), and is provided with a hood lock member, a rubber member that suppresses metal buffering with the hood, and the like.

  As shown in FIGS. 1 to 4, a pair of left and right radiator supports 13 for supporting a radiator and the like are provided across the upper bar 12 and the connecting brace 7 at the front portion of the food room. The pair of radiator supports 13 are members extending in the vertical direction of the vehicle, the upper ends thereof are respectively coupled to the upper bars 12, and the lower ends are positioned between the side members 1 of the connecting braces 7 and the upper frame 6. It is joined to each part. And the radiator support 13 is arrange | positioned so that a lower side may spread on the vehicle width direction outer side with respect to an upper side, and when a pair of radiator support 13 is seen from a vehicle front, it will become a substantially square shape (refer FIG. 4). Yes. The left and right radiator supports 13 are connected to each other by a cross member extending in the vehicle width direction in the vicinity of a substantially central portion in the vertical direction. The radiator support 13 holds devices such as lamps (not shown).

  As shown in FIGS. 1, 2, and 5, a fender shield 14, which is a plate-like member, is provided at a portion surrounded by the side member 1 in front of the strut house 16, the upper frame 6, and the connecting brace 7. . The fender shield 14 is joined so that the rear side of the vehicle is continuous with the strut house 16 and extends in front of the vehicle. The left and right sides are joined. And the front side of the fender shield 14 is joined to the connection brace 7, and the periphery is joined. The rear portion of the strut house 16 is joined to the vertical wall of the dash panel 10.

  5 shows the main plane of the right front portion of the vehicle. As shown in FIG. 5, the portion surrounded by the side member 1, the upper frame 6, and the connecting brace 7 at the front portion of the strut house 16 is a fender. The shield 14 is closed.

  Generally, in order to prevent mud and foreign matter from entering the food room, a resin mudguard member is provided in the fender. In this embodiment, the fender shield 14 prevents mud and foreign matter from entering. Since the function to prevent is fulfilled, the mudguard member can be omitted or made smaller. Since the connecting brace 7 that directly connects the side member 1 and the upper frame 6 is provided, the four sides of the fender shield 14 are joined to the side member 1, the upper frame 6, the connecting brace 7, and the strut house 16, respectively. Thus, the periphery is surrounded by a structure. Since the fender shield 14 is joined to the part surrounded by the side member 1, the upper frame 6 and the connecting brace 7, the deformation of the region surrounded by the side member 1 and the upper frame 6 can be suppressed. .

  As shown in FIGS. 5 and 8, the fender shield 14 is formed with a long convex portion 71 extending in the vehicle width direction. As shown in FIG. 6, the bottom surface of the long convex portion 71 has a hat-shaped cross section. A reinforcing material 72 is joined. And the closed cross-section part is formed in the fender shield 14 by the lower surface of the elongate convex part 71 and the reinforcing material 72, and the collision sensor etc. for an airbag are attached to the site | part by which rigidity was ensured by the closed cross-section part, for example. .

  As described above, in the vehicle body structure at the front portion of the vehicle in the present invention, the connecting brace 7 that connects the front end of the side member 1 and the front end of the upper frame 6 to the outer side in the vehicle width direction than the side member 1 is provided on the outer side in the vehicle width direction. Since the front end cross member 2 is extended so as to be inclined upward, the front end cross member 2 can be connected without increasing the width in the vertical direction and extending in the vehicle width direction or providing a wide portion outside the vehicle width direction. The area with respect to the input from the front surface can be accurately secured by the brace 7, and a load due to a collision or the like can be received over a wide range.

  Moreover, since the connecting brace 7 is made stronger by connecting the radiator support 13 to the central portion in the longitudinal direction of the connecting brace 7, the side member 1 can reliably receive a collision load input from the front during a collision or the like. And can be dispersed in the upper frame 6.

  For this reason, the structural member is unnecessarily increased in size and does not increase in weight, and even if the type of the opponent vehicle at the time of the collision is various such as RV, SUV, sedan, light, etc. The structural member can be received in a wide range of positions and height positions in the width direction.

  Further, the structure between the side member 1 in front of the strut house 16 and the upper frame 6 is closed by the fender shield 14 and joined to the connecting brace 7 so as to close the portion surrounded by the strut house 16 and suppress deformation. The phenomenon in which the upper frame 6 is deformed without being crushed in order from the front end side or is broken in the middle can be suppressed, and the collision load can be absorbed efficiently.

  Therefore, according to the vehicle body structure of the front portion of the vehicle of the present invention, the front end cross member (bumper reinforcement) can be accurately secured without increasing the area for input from the front, It is possible to prevent the vehicle from entering the passenger compartment and efficiently absorb the collision load, thereby improving the safety of the passenger.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of a vehicle body structure for a front part of a vehicle for alleviating a collision load from the front part of the vehicle.

It is a perspective view showing the vehicle body structure of the vehicle front part which concerns on the example of 1 embodiment of this invention. It is a disassembled perspective view of a vehicle front part (FIG. 1). It is a side view of a vehicle front part. It is a front view of a vehicle front part. It is a principal part top view of a vehicle front part. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4. It is CC sectional view taken on the line in FIG.

Explanation of symbols

1 Front floor side member (side member)
2 Front End Cross Member 3 Front Pillar 4 Side Sill 5 Joint Protrusion 6 Upper Frame 7 Connection Brace 8 Reinforcement Brace 9 Cowl Top Panel 10 Dash Panel 11 Extension Portion 12 Upper Bar 13 Radiator Support 14 Fender Shield 15 Bolt 16 Strut House

Claims (4)

A pair of left and right upper frames, which are located on the left and right of the front part of the vehicle compartment and extend in the vertical direction, are connected to the front end of the vehicle and extend forward of the vehicle, and below the upper frame. And a vehicle front side provided with a pair of side members disposed inward in the vehicle width direction from the front pillar and extending in front of the vehicle compartment, and a front end cross member connecting front end portions of the pair of side members. In the body structure of the
It is arranged on the outer side in the vehicle width direction with respect to the side member, and one end is joined to the front end of the side member, and the other end is joined to the front end of the upper frame. A vehicle body structure for a front portion of a vehicle, characterized in that an extended connection brace is provided. In the vehicle body structure of the vehicle front part according to claim 1,
The fender shield includes a plate-like fender shield that extends forward from a strut house that supports the suspension member, is joined to the side member and the upper frame, and closes between the side member and the upper frame. A vehicle body structure for a front part of a vehicle, wherein a front part is joined to the connecting brace and the side member, the upper frame, the connecting brace, and the strut house surround the fender shield. . In the vehicle body structure of the vehicle front part according to claim 1 or claim 2,
The vehicle body structure of the front portion of the vehicle, wherein the connecting brace is formed so that the width of the front end side of the upper frame is narrower than the front end side of the side member. In the vehicle body structure of the vehicle front part as described in any one of Claims 1-3,
A vehicle body structure at a front portion of the vehicle, wherein a radiator support is connected to the connecting brace.

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